Dounreay Fast Reactor (DFR) operated from 1962 to 1977. This is the familiar golf ball.

Dounreay Materials Test Reactor (DMTR) operated from 1965 to 1968.

PWR 1 Prototype of reactor used on Polaris submarines. In the military site at HMS Vulcan in Dounreay. Shut down.

PWR 2 Prototype of reactor used on Trident submarines. In the military site. The reactor is being refuelled 1997-98. This is not being closed down. It is used for research to modify the reactors and fuel rods on Trident submarines.